If you are going to get a CAI, get the C&L with the 80mm MAF. Yeah its $300 but worth it. I had the Steeda CAI and then went to the C&L and love it. Also as far as gears, get 4.10's. you will love them. You will be sitting at about 2200 RPM at 70 mph on the freeway. Also get a 75mm throttle...